Spotlamp



l June 5, 1923.

R. E. WILLIAMS sPoTLAMP l Filed April v, 1920 Patented June 5, 1923.

UNITED N sTATEs RALPH E. WILLIAMS, OF LOS ANGELES, CALIFORNIA..

SPOTLAMP.

Application led April 7, 1920. Serial No.`372,043.

To all 'whom t may concern,

Be it known that I, 'RALPH E. WILLIAMS, a citizen of the United States. residing at Los Angeles, in the county of'Los Angeles, State of California, "have invented new and useful Improvements in Spotlamps, of which the following is a specification.

This invention relates to lamps and more specifically to spotlamps such as are used in connection with automobiles and the like. An objectof the invention is to provide a lamp of this' character which is sightly, simple, effective,-and inexpensive to manufacture.

A particular and noteworthy feature of the invention is the extremely simple, leffec'- tive, and sightly construction of the lamp. The construction although extremely simple is strong, durable and water-tight so that the lamp 'can be yexposed to rainer severe weather without danger of water getting into it to short circuit the electrical connections, etc.

Further objects andy features ofuthe invention are set forth in the following specification wherein I describe a typical embodiment of the invention and throughout which reference is had l-to the accompanying drawin s, in whichv ig. 1 is alongitudinal sectional view of a lamp vembodying the present invention; Fig. 2 is an enlarged detail sectional view of the rear portion ofthe lamp; Fig. 3 is a transverse detail sectional view taken as indicated by line 3--3 on Fig. 2. l. y

Throughout the drawings the numeral. 1() designates the lamp which is carried on a bracket 11. The lamp 10 comprises a cylindrical casing 31 at the forward vend of which is a ange 32, which carries reflector 33, and over the rear end of which' is carried, or ex@ tends', a :cap 34. The cylindricall casing 31 is preferably cast orformed integral with the flange 32 and has arranged in it an elec-- trical connector 35 which carries and connects the bulb 36, arran ed within the reflector 33, with the plug3 carried in the'cap 34, The plug 37 which is carried in the cap 34 is connected with lead wires 38...

The electrical connector 35 comprises a metal sleeve 39 which is slidably carried in the casing 31 and in which is arrangedV a core 40 of insulating material. Contacts/41 extend longitudinally through the core 40. The inner or forward end of the sleeve 39 forms a socket 42 which carries `the base43 of bulb 36. The other end of the sleeve 39 is somewhat enlarged, in fact it isenlarged I so that its outside diameter is the same as the outside diameter of the casing 31,l to form a socket 46 which isadapted to receive and removably hold the lplug 37. The plug37 is screw threaded into the cap 34 andl vhas formed in it a groove 44 which co-,operates lwith a projection 45 vformed in and projecting from the wall of socket 46. The groove 44 and projection 45 co-operate to allow the make or break the electrical connection-betweenv the leadwires 38 and the contacts 41, or ybulb 36, without causing it to be brought yplug 37 to be rotated in the socket 46 to to aposition where it can be, oris liable to v be, withdrawn from the socket. It will ybe readily understood-how the plug 37 may be rotated or manipulated by the cap 34 so as to cause the contacts 47 inthe plug 37 to be in line, or engagement, with the contacts 41 in core 40, or so as to be out of'engage.-

ment with the contacts 41 inthe core 4Q, as desired. The particular formv of plugand socket f herein shown and described isv the subject mattery of a` co-pending applica.- tion of Henry I-I. Moreton, entitled Electrical connector SerialA No. 371,856 filed April 7, 1920. i

The cap 34 which carries the plug37 :is preferably a-.metal cap having a suitable knurled, or handle forming,l portion 50l by l which itmay be manipulated or rotated to cause. manipulation or rotation of the plug 37. The cap 34fformsa cylindricallsleeve 51 which extends or fits, over theexterior of the socket 46 and also the rear portionv ofk the l casing 31. Thecylindrical sleeve portion 51 of the cap 34` preferably fits the socket 46 and end portion rofcasing 31 fairly accurately, or'tightly being only sufficiently loose -to allow proper operation or manipulatlon of the cap. The sleeve 51 in extending lover the socket 46 andthe. rear end portion .of the. casing 31 not only makes the lamp sightly and neat in appearance` but also renders it practically water-tight. Further the space between the end of the casing 31 and the socket 46 is filled by a suitable washer 60 which positively checks the flow of water into the' interior of the light. It will be readily understood how any water, that passes between the outer wall of the rear end portion of the casing 31 and the inner wall of the sleeve 51, engages the washer 60 and is prevented from passing any further into the light. Although water is free to get into the rear portion 62, of the cap 34, through the hole 65,A in which lead wires 38 and spring 66 are carried, it can not get past the rear portion of the plug 37 due to the plug being tightly screw threaded in the cap 34 and the contacts being tightly carried in the plug. The spring 66, which is carried in the rear portion 62 of the cap 34 so as to extend through the hole or aperture 65 and rearwardly from the cap 34, is to protect the lead wires 38 and prevent them from being broken off at the cap.

The flange 32, which is formed at the end of the casing 31 and to which the reflector 33 is secured', conforms with the curvature of the refiector 33. The rciiector 33 is preferably soldered or otherwise tightly connected or secured' to the flange 67. A set screw 69 eX- tends through an enlarged portion 68 of the casing 31 and engages the sleeve 39 to set or lock it in any desired position in the casing 317. The sleeve 39 being slidably car'- ried in the casing 31 may be moved longitudinally therein, in order to properly focus or arrange the bulb 36 relative to the reflector 33, and may be set inthe proper position by the set screw 69. In practice the fiange 32' is preferably cast Hat and is subsequently stamped or pressed to have the proper curvature or conguration.

In the particular lamp shown in the drawings the light 1:0 is connected to the bracket 11 by suitable screws 70 which connect the arm 20 of the bracket 11, with the arm 71, which extends from the fiange 32. rllhe arm 71 is preferablyformed integral with the flange and is comparatively broad and flat, as shown in Figs. 1 and 2 of the dra-W- ings. The arm` 2O of the bracket 11 is also comparatively broad and fiat and is shaped to register, orvconform, with the shape of the arm 71. In the particularconstruction shown in the drawings thereare three screws provided to. connect' the arms 2O and 71, there being one screw arranged near the flange 32 and two at the outer portion of the arm 71, as clearly shown in F ig. 1 of the drawings. The screws 70, in connecting the arm 2O and 71,. extend through bores 72 1n the arm 20" and screw thread into screw threaded bores 73 in the arm 71.. There are' preferably annular wedge shapedv projections 74 on the arm 71 at the bores 73 which engage similarly shaped recesses 75 in the arm 20 at the bores 72, as clearly shown in Figs. 3 and 5 of the drawings. The projections 74 and recesses 7 5 co-operate to relieve shearing strains from the screws 70 and cause the screws '70 to act merely as clamping members, or so as to hold the two arms together.

It is to be noted that the lamp provided by the invention requires very little machine work for manufacture of parts and assembly. The fiange and casing are formed practically entirely without machine work, the flange being pressed to shape and the interior of the casing being brought to proper size by broaching. The assembled re- Hector, liange and casing are enameled or otherwise finished to suit. The connection between the lamp and bracket requires only the drilling and topping of the screw holes. The parts of the connector are drawn from tubing; and the cap 34 may be cast or pressed or drawn.

Having set forth only a preferred embodiment of my invention I do not wish to limit or restrict myself to the details hereinabove set forth butV wish to reserve to myself any changes or modifications that mayv appear to those skilled in the art or that may fall within the scope of the following claims.

Having described a preferred form of my invention, I claim:

1. In a lamp of the character described, a cylindrical casing, an electrical connector arranged in the casing, a socket formed at the rear end of the electrical connector and extended beyond the rear end of the casing, the socket extension comprising a cylindrical wall the same size as the casing, a cap, a plug carried in the cap and adapted to eX- tendY into and co-operate with the socket, and a cylindrical sleeve extending from the cap to slidably fit. over and cover the socket and the rear end of the casing.

2. In a lamp of the character described, a casing, an electrical connector carried in the casing, a socket formed at the rear end of the electrical connector and extended beyond the rear end of the casing, the socket extension being the same size as the casing and arranged relative to the casing' so that there is a space between it and the rear end of the casing, a washer arranged in said space, a cap adapted to cover the rear end of the casing, thewasher, and the socket, and a plug carried in the cap and adapted to co-operate with the socket.

3. A lamp of the character described cornprising, a cylindrical casing, a flange formed at the front end of the casing, a reflector .mounted on the flange, an electrical connector carried in the casing, a socket formed at the rear end of the electrical connector and extended beyond the rear end of the casing, the socket extension being the 'same size as the casing and spaced from the casing so that there is a space between the rear end of the casing and the socket, a washer have hereunto subscribed my name this 24th arranged n said space, a cap, a plug oark day of March, 1920.

red in the cap to (zo-operate With the soo et and a sleeve formed on the cap to exten RALPH E WILLIAMS" over and cover the socket, the Washer, and Witness:

the rear portion of the casing. VIRGINIA BERINGER.

In witness that I daim the foregoing I 

